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Alloy steels are designated by AISI four-digit numbers. The first two digits represent the main alloying elements, and the last two digits represent the carbon content present in the alloy in hundredth of a percent. They comprise different kinds of steels which exceed the composition limits of Mn, C, Mo, Si, Ni, Va, and B in the carbon steels. They respond more quickly to mechanical and heat treatments than the carbon steels.
The following datasheet wifocuses on AISI 5130 alloy steel in more detail.
The following table shows the chemical composition of AISI 5130 alloy steel.
| Element | Content (%) |
|---|---|
| Iron, Fe | 97.295 - 98.07 |
| Chromium, Cr | 0.800 - 1.10 |
| Manganese, Mn | 0.700 - 0.900 |
| Carbon, C | 0.280 - 0.330 |
| Silicon, Si | 0.150 - 0.300 |
| Sulfur, S | 0.0400 |
| Phosphorous, P | 0.0350 |
The physical properties of AISI 5130 alloy steel are tabulated below.
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.83 g/cm3 | 0.283 lb/in³ |
The mechanical properties of AISI 5130 alloy steel are outlined in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
| Hardness, Brinell (annealed) | 170 | 170 |
| Hardness, Brinell (normalized) | 241 | 241 |
| Hardness, Knoop (converted from Brinell hardness) | 191 | 191 |
| Hardness, Rockwell B (converted from Brinell hardness) | 86 | 86 |
| Hardness, Vickers (converted from Brinell hardness) | 178 | 178 |
| Machinability (annealed and cold drawn. Based on 100 machinability for AISI 1212 steel) | 70 | 70 |
The thermal properties of AISI 5130 alloy steel are given in the following table.